WhoisUP monitors hosts via ICMP and shows the status in a webpage. When a host is down, it can send mail, write a syslog message, open a popup message, or play a sound. It uses Nmap to check hosts continuously.
The Rezgo Open Source PHP Parser is a tour and activity booking system for developers who want to integrate the Rezgo white label booking engine directly into their own website. It connects directly to the Rezgo XML API and handles searching, browsing, and booking.